21470667646612 has 24 divisors (see below), whose sum is σ = 37713496141440. Its totient is φ = 10695451272000.

The previous prime is 21470667646543. The next prime is 21470667646627. The reversal of 21470667646612 is 21664676607412.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7270393 + ... + 9787744.

It is an arithmetic number, because the mean of its divisors is an integer number (1571395672560).

Almost surely, 2^{21470667646612} is an apocalyptic number.

It is an amenable number.

21470667646612 is a deficient number, since it is larger than the sum of its proper divisors (16242828494828).

21470667646612 is a wasteful number, since it uses less digits than its factorization.

21470667646612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17059311 (or 17059309 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 58.

The spelling of 21470667646612 in words is "twenty-one trillion, four hundred seventy billion, six hundred sixty-seven million, six hundred forty-six thousand, six hundred twelve".